[ZE620KL] How To Go Back To Stock Firmware

Be careful. If you do something wrong you may damage your phone. Doesn’t work with Android 10 Firmware. You need to go back to Pie to be able to flash.

You need raw firmware. You may not find the latest version. I’ve found V16.0615.1903.92.

1- Download the zip file and extract it.
2- Go to Fastboot.
3- Run ze620kl_auto_flash_raw.bat from zip file you extracted.
4- It will take up to 5-7 minute and will reboot automaticly.
5- Then you can install latest update from
If you want to re-lock bootloader follow these steps:
## First you have to install stock firmware of course.
1- Go to recovery(This is stock of course after installing stock firmware). Wipe cache then format data. When you enter reboot option press Volume Up for bootloader(try not to boot into system. If you boot you have to wipe cache and data again)
2-

Code:

fastboot oem reset-dev_info

Code:

fastboot oem force-reset

For locking bootloader, credits to

You need raw firmware. You may not find the latest version. I’ve found V16.0615.1903.92. https://drive.google.com/uc?id=16sY03_C14qqqldYjyurH_hyTgYEASEau&export=download (This is from mtkdevelopers.com)1- Download the zip file and extract it.2- Go to Fastboot.3- Run ze620kl_auto_flash_raw.bat from zip file you extracted.4- It will take up to 5-7 minute and will reboot automaticly.5- Then you can install latest update from https://www.asus.com/Phone/ZenFone-5-ZE620KL/HelpDesk_BIOS/ 1- Go to recovery(This is stock of course after installing stock firmware). Wipe cache then format data. When you enter reboot option press Volume Up for bootloader(try not to boot into system. If you boot you have to wipe cache and data again)2-and3- Then reboot. Now you are in stock firmware and locked bootloader. Your bootloader warning should be gone. Still you can’t get ota updates because your Imei number blacklisted. You have to install updates from zip file you get from Asus’s website.For locking bootloader, credits to @lopestom